I have been using the sum function for a very long time, but just recently got a new computer and the "new" Excel 2007. A few things have tripped me up here, and I'm hoping there's some magic button I haven't found yet to fix my problem.
I am having problems with a basic sum formula. I created the formula for one column and it worked great. Then I filled across and it worked great for the next two columns, but the last returned "zero" as an answer. I tried formatting the numbers as text in the cell formatting section. I tried copying the numbers and doing a "paste special" as a "value", but strangely that actually seemed to make the numbers text (lined up on the left - where the original ones lined up on the right).
If the SUM is returning 0, then the data is most likely not all text or the cells being summed are not all formatted as numeric, or they actually coincidentally sum to zero.
In your sum formula:
=SUM(E1:E20)
, then select the cells "E1:E20"If you see quotes around the numbers, then they are text formatted cells. You may see ={"100";"150",...}
You can fix this by doing the following:
You may need to press F9 afterwards in order to recalculate.
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